Wanting to freshen up a Philco 40-180

I just got my hands on a Philco 40-180 from a neighbor and I would really like to clean it up a bit and give it to my grandparents since its the same kind they used to own. I plugged it in and it does seem to work...it hums and if I put my hand on the antenna in the back it will pick up a station or two. The front buttons are shot and the light seems to be out behind the station selector. Other than dusting it off and ordering some replacement buttons what should I check for or do to the radio to get it back to working order. I pretty much have no radio knowledge at all so any help you guys can give would be much appreciated.

Thanks!